SUBSERVIENTLY
obsequiously, subserviently, servilely
(adverb) in an obsequious manner; “she acts obsequiously toward her boss”
Source: WordNet® 3.1
Etymology
Adverb
subserviently (comparative more subserviently, superlative most subserviently)
In a subservient manner.
Source: Wiktionary
Sub*serv"i*ent*ly, adv.
Definition: In a subservient manner.
SUBSERVIENT
Sub*serv"i*ent, a. Etym: [L. subserviens, -entis, p.pr. See
Subserve.]
Definition: Fitted or disposed to subserve; useful in an inferior capacity;
serving to promote some end; subordinate; hence, servile, truckling.
Scarce ever reading anything which he did not make subservient in one
kind or other. Bp. Fell.
These ranks of creatures are subservient one to another. Ray.
Their temporal ambition was wholly subservient to their proselytizing
spirit. Burke.
Source: Webster’s Unabridged Dictionary 1913 Edition